Banana passion fruit is an exquisite vine that produces stunningly fragrant flowers shaped like the caps that cover Christmas lights. While most growers propagate these plants using cuttings, banana passion fruit can be grown from seeds, even those that are already dry. Keep in mind that if the seeds are acquired from a commercially grown piece of fruit, they will most likely only flower, as most commercial varieties are hybrids.
Soak the seeds in lukewarm water for five weeks.
Place the softened seeds into medium pots with seed-raising soil. More than one seed can be placed in each pot, so long as they are placed a few centimeters apart. Moisten the soil well, and place in a warm, sunny window to promote germination.
Separate the sprouts into different pots once they emerge. Keep the soil moist in the pots to promote root growth.
Tie the sprouts to a stick when they are 4 inches tall to promote straight growth.
Transplant the plants into larger pots whenever their roots outgrow the pot. If transplanting the plants outside, consider waiting until early spring to ensure hearty root growth before winter frosts.